Causes and Maintenance of the Influent Tank of Cummins Diesel Engine Oil Pan (1)

1, cylinder liner damage:

The Cummins NT855 diesel engine uses a wet cylinder liner, and the cylinder liner is directly in contact with the cooling water of the diesel engine to dissipate heat. Cooling water scours the outer surface of the cylinder liner during the cycle and forms cavitation and cavitation on the outer surface of the cylinder liner. Over time, the outer surface of the cylinder liner will have a dense crater at the water surface. Perforation of cylinder liner into Qinghai generator in diesel engine oil pan   Xining Generator   Golmud Generator    . To check whether the cylinder liner is perforated or specifically which cylinder liner is rusted and perforated, remove the diesel engine sump and fill the radiator tank with water. Twist the diesel engine slowly to observe whether there is water flowing out of the cylinder wall or Dripping, if there is leakage of coolant, it can be judged that the cylinder liner has been perforated; In addition, if the water barrier of the cylinder liner is damaged, the coolant will enter the oil pan, if it is found that the coolant is dripping from the outer wall of the cylinder liner, It may be due to damage to the rubber water stop ring. When turning a diesel engine, if it is very difficult to turn,   Delingha Generator   Haidong Generator   Haibei generator   Can not be forced to turn; this situation may occur because the cylinder in the compression stroke into the cooling fluid, this time, if not pay attention, it may damage the diesel engine rod or other components.

2, oil radiator damage:

The heat dissipation of the Cummins NT855 diesel engine oil is accomplished by a cylinder oil radiator mounted on the side of the diesel engine. The radiator core is composed of a row of copper tubes. The coolant flows in the radiator core copper tube. The diesel engine oil circulates outside the tube. During the flow, the high temperature engine oil is cooled by the cooling liquid to ensure a certain oil temperature. When the radiator copper pipe breaks or the seal at both ends of the radiator core fails, the coolant may enter the diesel engine oil pan through the oil channel. When the diesel engine is working, the oil pressure should be higher than the pressure of circulating water, Haixi generator   Huang Nan Generator   Yushu Generator   Guoluo Generator   Under the effect of pressure difference, the oil can enter the coolant through the crack of the copper tube. At this time, there is oil in the diesel engine water tank; when the diesel engine stops working, since the water level of the water tank is higher than the oil radiator, the cooling water will enter the oil passage through the radiator tube under the pressure formed by the height difference. In the diesel engine oil pan, it is necessary to judge whether the diesel radiator is organic oil. When the radiator core copper pipe is damaged, it is necessary to use compressed air for inspection. The specific method is: Seal the ends of the radiator core with an iron plate, leaving a hole at one end and filling the copper pipe with water through the small hole. , Use 7kg of compressed air to blow from the small hole and keep it for 5-10min. If there is water or gas coming out of the oil passage of the radiator, it can be determined that the radiator copper tube is damaged and it must be replaced. In addition, if the seal of both ends of the radiator core fails with the radiator shell, it may cause cooling water to enter the oil pan.